.add-tag-item {
    position: relative;
    display: inline-block;
    width: 30%;
    margin: 10px 0;
    text-align: center;
    user-select: none;
}

.add-tag-item div {
    display: inline-block;
    position: relative;
    cursor: pointer;
}

.add-tag-item div::before {
    position: absolute;
    content: '';
    left: 0;
    bottom: 0px;
    width: 0%;
    height: 3px;
    background: #2D8CF0;
    transition: 0.3s;
}

.add-tag-item div:hover::before {
    width: 100%;
}